Chapter on the Prayer Times (Mawaqit)
Tahdhīb al-Aḥkām|Volume 2|Book 1|Chapter 13
أَحْمَدُ عَنِ اَلْبَرْقِيِّ عَنْ سَعْدِ بْنِ سَعْدٍ قَالَ قَالَ اَلرِّضَا عَلَيْهِ اَلسَّلاَمُ:« يَا فُلاَنُ إِذَا دَخَلَ اَلْوَقْتُ عَلَيْكَ فَصَلِّهِمَا فَإِنَّكَ لاَ تَدْرِي مَا يَكُونُ»
Ahmad narrated from Al-Barqi from Sa'd ibn Sa'd who said:
(Imam) Al-Ridha عليه السلام, peace be upon him, said: "O so-and-so, when the time enters upon you, then pray them both, for you do not know what may happen."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 292
- Ṣaḥīḥ al-Tahdhīb